EP1295310A1 - Protection en dome pour lampes a halogene-metal protegees - Google Patents

Protection en dome pour lampes a halogene-metal protegees

Info

Publication number
EP1295310A1
EP1295310A1 EP01984075A EP01984075A EP1295310A1 EP 1295310 A1 EP1295310 A1 EP 1295310A1 EP 01984075 A EP01984075 A EP 01984075A EP 01984075 A EP01984075 A EP 01984075A EP 1295310 A1 EP1295310 A1 EP 1295310A1
Authority
EP
European Patent Office
Prior art keywords
lamp
disk
frame members
arc tube
sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP01984075A
Other languages
German (de)
English (en)
Inventor
Kevin S. Dombrowski
Thomas W. Morris
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of EP1295310A1 publication Critical patent/EP1295310A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/34—Double-wall vessels or containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
    • H01J61/827—Metal halide arc lamps

Definitions

  • the invention relates to a lamp, in particular, a metal halide discharge lamp having a protective sleeve surrounding an arc tube, wherein the sleeve and the arc tube are supported by a metal frame mounted to the stem, and a glass envelope fixed to the stem surrounds the sleeve.
  • Metal halide lamps typically incorporate a tubular shield surrounding the pressurized arc tube to absorb the impact of dispersing shards in the event the arc tube fractures. Both the shield and the arc tube are supported by a metal frame mounted to the stem, which frame is electrically isolated from the leads for the arc tube. This is especially important for high wattage lamps. Since current carrying members in proximity to the arc tube can cause sodium loss, it is preferable to electrically distance the current carriers from the lateral walls of the arc tube.
  • U.S. serial no. 09/165,681 discloses a metal halide lamp of the type described above, wherein an arc tube and the surrounding shield are supported by a metal frame mounted to the stem. Current is supplied to the arc tube by a braided wire for the lower electrode and a flying lead well spaced from the arc tube for the upper electrode.
  • the construction is especially suitable for a 1000 watt lamp.
  • Mica shields have been incorporated into metal halide lamps to reduce the amount of reflected heat to the lamp stem or base area, as well as to reduce photo-emissions of the tungsten filament in fail-safe lamps. However, the dome of the outer bulb envelope is left unprotected.
  • a lamp includes a light source having a pair of opposed pinched ends; and a wire frame formed from a pair of substantially parallel wire frame members and a top section where the two frame members meet.
  • a tubular sleeve surrounds the light source between the frame members.
  • the lamp also includes a disk having a slot where the disk is inserted over the top section through the slot.
  • a clip is attached to the tip of the top section and holds the disk in place. The clip has bent sides that form corners which contact the disk. In the event of arc tube failure, the disk protects the dome of the glass outer envelope of the lamp, by assuring that flying fragments will not hit the dome of the outer envelope and cause it to fracture.
  • Figure la is a side view of the lamp according to the invention
  • Figure lb is a side view seen orthogonally to figure la according to the invention.
  • Figure 2 is a top view of the mica disk according to the invention.
  • Figures la and lb show a metal halide discharge lamp including a screw base 10 with an insulated center contact.11, a glass stem 12, and a glass envelope 14 sealed to the stem 12. Inside the lamp is an arc tube 28 with opposed pinched ends 31, 33.
  • a first lead 18 and a second lead 22 are received through the stem 12 and connected to respective lead- throughs 30, 32 in opposed pinched ends 31, 33 of the arc tube 28. These serve as electrodes for maintaining an arc.
  • the first lead 18 is connected to the first lead-through 30 via flying lead 26, while the second lead 22 is connected to the second lead-through 32 via braided connection 20.
  • a starter 24 causes a glow discharge at the first end, whereupon a bimetal strip in the starter 24 opens to shunt current through lead flying 26 to the second electrode.
  • Starting circuits are described in some detail in U.S. 5,079,480.
  • a frame 50 is formed of steel wire and includes a pair of parallel frame members 52, 54 and a top section 53 where the two frame members 52, 54 meet at the top 56 of the frame 50.
  • Each of the members 52, 54 is attached at its lower end to the glass stem 12 via a ring 55, which is slipped over the bottom ends of the members 52, 54.
  • the frame members 52, 54 are electrically isolated from the leads 18, 22.
  • the top 56 of the frame 50 has welded thereto a leaf spring 57 (also referred to as a spring clip), which positions the frame 50 with respect to the envelope 14 and holds a disk 64 as will be described.
  • a tubular sleeve 40 made of quartz surrounds the arc tube 28 between the upright frame members 52, 54.
  • the quartz sleeve 40 absorbs the impact of flying shards of arc tube in the event of non-passive failure.
  • a wire helix 46 surrounding the sleeve 40 limits radial dispersion of any quartz fragments in the event the sleeve 40 fractures, thus further protecting the glass envelope 14 in the event of arc tube failure.
  • the sleeve 40 has a pair of diametrically opposed apertures 43 adjacent to its upper end 42, and a pair of diametrically opposed apertures 45 adjacent to its lower end 44. Each pair of apertures 43, 45 receives an elongate U-clip 60, having an open end and a closed end.
  • the quartz sleeve 40 is present in protected metal halide lamps which may be operated safely in opened fixtures, where there is no front glass.
  • the quartz sleeve 40 which is positioned over the arc tube 28, assists in the containment of the arc tube 28 when the lamp fails, such as during forced (capacitive discharge) rupture testing, for example.
  • the top or dome end 62 of the outer bulb jacket or envelope 14 of conventional lamps is prone to damage when the lamp fails, for example, to the extent that penetration of the hot arc tube/shroud components occurs.
  • a disk 64 is positioned within the mount structure in such a way as to shield the dome 62 from damage.
  • the disk 64 is a mica disk.
  • the length 70 of the slot 66 is sufficiently long so that when the disk 64 is placed over the top end 56 of the main frame 50 to slip over the top frame section 53 through the slot 66, the spring clip 57 can be welded, e.g., resistance welded, in place to the top end 56 of the frame 50, which in turn, the spring clip 57 supports the disk 64 in place.
  • the edges of the spring clip 57 are bent inward at corners 72 to provide secure support of the disk 64 which contacts the spring clip edges, preferably at or near the corners 72.
  • the overall diameter 74 ( Figure 2) of the disk 64 is such that it covers the major portion of the inside surface of the outer bulb dome 62, thus protecting the dome 62 from contact with the hot ruptured arc tube/shroud fragments when the lamp fails.
  • the diameter 74 of the disk 64 is at least as large as a distance between the parallel wire frame members 52, 54.
  • the length 70 of the slot 66 is approximately 0.320 inches and the diameter 74 of the disk 64 is approximately 1.811 inches.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)

Abstract

Une lampe à halogène-métal comprend un tube à régime d'arc et un manchon périphérique tubulaire à quartz entre un cadre de fil métallique. Le cadre de fil métallique est composé d'une paire d'éléments de cadre de fil métallique sensiblement parallèles et d'une partie supérieure dans laquelle les deux éléments de cadre se rencontrent. Les deux éléments de cadre sont montés sur une tige de verre contenant des conducteurs d'alimentation en courant. Le manchon est doté de deux paires d'ouvertures diamétralement opposées, chaque paire d'ouvertures recevant une pince en U en fil métallique allongée venant en prise avec une extrémité pincée du tube en régime d'arc à l'intérieur du manchon et les éléments de cadre à l'extérieur du manchon. Un disque présentant une fente est inséré sur une partie haute du cadre de fil par la fente.
EP01984075A 2000-06-29 2001-06-20 Protection en dome pour lampes a halogene-metal protegees Withdrawn EP1295310A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/606,394 US6459191B1 (en) 2000-06-29 2000-06-29 Dome shield for protected metal halide lamps
US606394 2000-06-29
PCT/EP2001/007075 WO2002001600A1 (fr) 2000-06-29 2001-06-20 Protection en dome pour lampes a halogene-metal protegees

Publications (1)

Publication Number Publication Date
EP1295310A1 true EP1295310A1 (fr) 2003-03-26

Family

ID=24427786

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01984075A Withdrawn EP1295310A1 (fr) 2000-06-29 2001-06-20 Protection en dome pour lampes a halogene-metal protegees

Country Status (5)

Country Link
US (1) US6459191B1 (fr)
EP (1) EP1295310A1 (fr)
JP (1) JP2004502277A (fr)
CN (1) CN1264194C (fr)
WO (1) WO2002001600A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050215321A1 (en) * 2004-03-29 2005-09-29 Saied Hussaini Video game controller with integrated trackball control device
US7057334B2 (en) * 2004-05-17 2006-06-06 Osram Sylvania Inc. Mount for metal halide arc discharge lamp
US20070108912A1 (en) * 2005-11-16 2007-05-17 Leonard James A Device for containing arc tube ruptures in lamps
JP5134054B2 (ja) * 2010-08-17 2013-01-30 パナソニック株式会社 金属蒸気放電ランプおよび照明装置

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4281274A (en) 1979-08-01 1981-07-28 General Electric Co. Discharge lamp having vitreous shield
US4499396A (en) * 1982-08-18 1985-02-12 Gte Products Corporation Metal halide arc discharge lamp with means for suppressing convection currents within the outer envelope and methods of operating same
CA1305995C (fr) * 1987-08-28 1992-08-04 William M. Keeffe Lampe a double enveloppe, avec ecran entourant la source lumineuse, a l'interieur d'une enveloppe externe de forte epaisseur
US4942330A (en) * 1988-09-30 1990-07-17 Gte Products Corporation Lamp assembly utilizing shield and ceramic fiber mesh for containment
US5079480A (en) 1990-03-08 1992-01-07 North American Philips Corp. Bimetal/resistor switch and ceramic bridge assembly for metal halide lamps
US5051657A (en) * 1990-06-15 1991-09-24 Gte Products Corp. Safety filament assembly for double-enveloped arc discharge lamp
US5729078A (en) 1991-12-23 1998-03-17 U.S. Philips Corporation Electric lamp with containment sleeve having a helically coiled metal wire
JP3228310B2 (ja) * 1993-08-27 2001-11-12 松下電子工業株式会社 メタルハライドランプ
US5493167A (en) * 1994-05-03 1996-02-20 General Electric Company Lamp assembly with shroud employing insulator support stops
US5719463A (en) * 1996-06-03 1998-02-17 General Electric Company Retaining spring and stop means for lamp mount
US6153968A (en) * 1998-10-02 2000-11-28 Philips Electronics North America Corp. Metal halide lamp with stem mounted support frame for arc tube shield
US6291933B1 (en) * 1999-09-24 2001-09-18 Philips Electronics North America Corporation Metal halide lamp with ARC tube secured to frame by clips passing through protective sleeve

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0201600A1 *

Also Published As

Publication number Publication date
US6459191B1 (en) 2002-10-01
WO2002001600A1 (fr) 2002-01-03
CN1264194C (zh) 2006-07-12
CN1383577A (zh) 2002-12-04
JP2004502277A (ja) 2004-01-22

Similar Documents

Publication Publication Date Title
US5493167A (en) Lamp assembly with shroud employing insulator support stops
US6741013B2 (en) Shrouded electric lamp having functionally distinguishable center supports
CA1164922A (fr) Lampe a decharge haute intensite avec dispositif integre d'extinction de l'arc
EP1046189B1 (fr) Lampe a iodures metalliques, dotee d'un cadre de support monte sur une tige et servant d'ecran de tube a arc
CA2294667A1 (fr) Tube a arc, element de montage et ensemble de lampe electrique
EP0540019B1 (fr) Assemblage de lampe à décharge à arc contenant un halogénure métallique
US6291933B1 (en) Metal halide lamp with ARC tube secured to frame by clips passing through protective sleeve
EP0186899B1 (fr) Lampe à halogénure métallique à support de bouclier de tube à arc
US6459191B1 (en) Dome shield for protected metal halide lamps
EP2018657A2 (fr) Lampe à arc hid compacte comportant un tube à arc enveloppé et un fil de sortie hélicoïdal
EP0645801B1 (fr) Lampe à décharge haute pression
EP1101242B1 (fr) Lampe a halogenure de metal avec un manchon de protection
EP0565375A1 (fr) Lampe à décharge en arc à double terminaison
EP0381279B1 (fr) Lampe à décharge dans le gaz à haute pression
JP4861583B2 (ja) 高圧金属蒸気放電ランプおよび照明器具
EP0145291B1 (fr) Lampe type sealed-beam
EP1092230B1 (fr) Lampe a decharge d'arc
US4916351A (en) Arc tube having crystalline press seal penetration suppression means and lamp employing same
JP4248910B2 (ja) 高圧放電ランプ
JP4294079B2 (ja) 高圧放電ランプ
JP4327896B2 (ja) 高圧放電ランプ

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20020806

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20060420